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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     * =================================================================================<a name="line.2"></a>
<FONT color="green">003</FONT>     *<a name="line.3"></a>
<FONT color="green">004</FONT>     * BSD LICENCE (http://en.wikipedia.org/wiki/BSD_licenses)<a name="line.4"></a>
<FONT color="green">005</FONT>     *<a name="line.5"></a>
<FONT color="green">006</FONT>     * ARTIFACT='barchart-udt4';VERSION='1.0.2-SNAPSHOT';TIMESTAMP='2011-01-11_09-30-59';<a name="line.6"></a>
<FONT color="green">007</FONT>     *<a name="line.7"></a>
<FONT color="green">008</FONT>     * Copyright (C) 2009-2011, Barchart, Inc. (http://www.barchart.com/)<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     * All rights reserved.<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     * Redistribution and use in source and binary forms, with or without modification,<a name="line.12"></a>
<FONT color="green">013</FONT>     * are permitted provided that the following conditions are met:<a name="line.13"></a>
<FONT color="green">014</FONT>     *<a name="line.14"></a>
<FONT color="green">015</FONT>     *     * Redistributions of source code must retain the above copyright notice,<a name="line.15"></a>
<FONT color="green">016</FONT>     *     this list of conditions and the following disclaimer.<a name="line.16"></a>
<FONT color="green">017</FONT>     *<a name="line.17"></a>
<FONT color="green">018</FONT>     *     * Redistributions in binary form must reproduce the above copyright notice,<a name="line.18"></a>
<FONT color="green">019</FONT>     *     this list of conditions and the following disclaimer in the documentation<a name="line.19"></a>
<FONT color="green">020</FONT>     *     and/or other materials provided with the distribution.<a name="line.20"></a>
<FONT color="green">021</FONT>     *<a name="line.21"></a>
<FONT color="green">022</FONT>     *     * Neither the name of the Barchart, Inc. nor the names of its contributors<a name="line.22"></a>
<FONT color="green">023</FONT>     *     may be used to endorse or promote products derived from this software<a name="line.23"></a>
<FONT color="green">024</FONT>     *     without specific prior written permission.<a name="line.24"></a>
<FONT color="green">025</FONT>     *<a name="line.25"></a>
<FONT color="green">026</FONT>     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"<a name="line.26"></a>
<FONT color="green">027</FONT>     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED<a name="line.27"></a>
<FONT color="green">028</FONT>     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.<a name="line.28"></a>
<FONT color="green">029</FONT>     * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,<a name="line.29"></a>
<FONT color="green">030</FONT>     * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,<a name="line.30"></a>
<FONT color="green">031</FONT>     * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,<a name="line.31"></a>
<FONT color="green">032</FONT>     * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,<a name="line.32"></a>
<FONT color="green">033</FONT>     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING<a name="line.33"></a>
<FONT color="green">034</FONT>     * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.<a name="line.34"></a>
<FONT color="green">035</FONT>     *<a name="line.35"></a>
<FONT color="green">036</FONT>     * Developers: Andrei Pozolotin;<a name="line.36"></a>
<FONT color="green">037</FONT>     *<a name="line.37"></a>
<FONT color="green">038</FONT>     * =================================================================================<a name="line.38"></a>
<FONT color="green">039</FONT>     */<a name="line.39"></a>
<FONT color="green">040</FONT>    package com.barchart.udt.nio;<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>    import java.io.IOException;<a name="line.42"></a>
<FONT color="green">043</FONT>    import java.net.InetSocketAddress;<a name="line.43"></a>
<FONT color="green">044</FONT>    import java.net.Socket;<a name="line.44"></a>
<FONT color="green">045</FONT>    import java.net.SocketAddress;<a name="line.45"></a>
<FONT color="green">046</FONT>    import java.nio.ByteBuffer;<a name="line.46"></a>
<FONT color="green">047</FONT>    import java.nio.channels.ClosedChannelException;<a name="line.47"></a>
<FONT color="green">048</FONT>    import java.nio.channels.ConnectionPendingException;<a name="line.48"></a>
<FONT color="green">049</FONT>    import java.nio.channels.IllegalBlockingModeException;<a name="line.49"></a>
<FONT color="green">050</FONT>    import java.nio.channels.SocketChannel;<a name="line.50"></a>
<FONT color="green">051</FONT>    import java.nio.channels.UnresolvedAddressException;<a name="line.51"></a>
<FONT color="green">052</FONT>    import java.nio.channels.spi.SelectorProvider;<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>    import org.slf4j.Logger;<a name="line.54"></a>
<FONT color="green">055</FONT>    import org.slf4j.LoggerFactory;<a name="line.55"></a>
<FONT color="green">056</FONT>    <a name="line.56"></a>
<FONT color="green">057</FONT>    import com.barchart.udt.SocketUDT;<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>    /**<a name="line.59"></a>
<FONT color="green">060</FONT>     * you must use {@link SelectorProviderUDT#openSocketChannel()} to obtain<a name="line.60"></a>
<FONT color="green">061</FONT>     * instance of this class; do not use JDK<a name="line.61"></a>
<FONT color="green">062</FONT>     * {@link java.nio.channels.SocketChannel#open()};<a name="line.62"></a>
<FONT color="green">063</FONT>     * <a name="line.63"></a>
<FONT color="green">064</FONT>     * example:<a name="line.64"></a>
<FONT color="green">065</FONT>     * <a name="line.65"></a>
<FONT color="green">066</FONT>     * [code]<a name="line.66"></a>
<FONT color="green">067</FONT>     * <a name="line.67"></a>
<FONT color="green">068</FONT>     * SelectorProvider provider = SelectorProviderUDT.DATAGRAM;<a name="line.68"></a>
<FONT color="green">069</FONT>     * <a name="line.69"></a>
<FONT color="green">070</FONT>     * SocketChannel clientChannel = provider.openSocketChannel();<a name="line.70"></a>
<FONT color="green">071</FONT>     * <a name="line.71"></a>
<FONT color="green">072</FONT>     * clientChannel.configureBlocking(true);<a name="line.72"></a>
<FONT color="green">073</FONT>     * <a name="line.73"></a>
<FONT color="green">074</FONT>     * Socket clientSocket = clientChannel.socket();<a name="line.74"></a>
<FONT color="green">075</FONT>     * <a name="line.75"></a>
<FONT color="green">076</FONT>     * InetSocketAddress clientAddress = new InetSocketAddress("localhost", 10000);<a name="line.76"></a>
<FONT color="green">077</FONT>     * <a name="line.77"></a>
<FONT color="green">078</FONT>     * clientSocket.bind(clientAddress);<a name="line.78"></a>
<FONT color="green">079</FONT>     * <a name="line.79"></a>
<FONT color="green">080</FONT>     * assert clientSocket.isBound();<a name="line.80"></a>
<FONT color="green">081</FONT>     * <a name="line.81"></a>
<FONT color="green">082</FONT>     * InetSocketAddress serverAddress = new InetSocketAddress("localhost", 12345);<a name="line.82"></a>
<FONT color="green">083</FONT>     * <a name="line.83"></a>
<FONT color="green">084</FONT>     * clientChannel.connect(serverAddress);<a name="line.84"></a>
<FONT color="green">085</FONT>     * <a name="line.85"></a>
<FONT color="green">086</FONT>     * assert clientSocket.isConnected();<a name="line.86"></a>
<FONT color="green">087</FONT>     * <a name="line.87"></a>
<FONT color="green">088</FONT>     * [/code]<a name="line.88"></a>
<FONT color="green">089</FONT>     */<a name="line.89"></a>
<FONT color="green">090</FONT>    public class ChannelSocketUDT extends SocketChannel implements ChannelUDT {<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>            private static final Logger log = LoggerFactory<a name="line.92"></a>
<FONT color="green">093</FONT>                            .getLogger(ChannelSocketUDT.class);<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>            final SocketUDT socketUDT;<a name="line.95"></a>
<FONT color="green">096</FONT>    <a name="line.96"></a>
<FONT color="green">097</FONT>            ChannelSocketUDT(SelectorProvider provider, SocketUDT socketUDT) {<a name="line.97"></a>
<FONT color="green">098</FONT>                    super(provider);<a name="line.98"></a>
<FONT color="green">099</FONT>                    this.socketUDT = socketUDT;<a name="line.99"></a>
<FONT color="green">100</FONT>            }<a name="line.100"></a>
<FONT color="green">101</FONT>    <a name="line.101"></a>
<FONT color="green">102</FONT>            @Override<a name="line.102"></a>
<FONT color="green">103</FONT>            protected void implCloseSelectableChannel() throws IOException {<a name="line.103"></a>
<FONT color="green">104</FONT>                    socketUDT.close();<a name="line.104"></a>
<FONT color="green">105</FONT>            }<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>            /*<a name="line.107"></a>
<FONT color="green">108</FONT>             * local volatile variable, which mirrors super.blocking, to avoid the cost<a name="line.108"></a>
<FONT color="green">109</FONT>             * of synchronized call inside isBlocking()<a name="line.109"></a>
<FONT color="green">110</FONT>             */<a name="line.110"></a>
<FONT color="green">111</FONT>            private volatile boolean isBlockingMode = isBlocking();<a name="line.111"></a>
<FONT color="green">112</FONT>    <a name="line.112"></a>
<FONT color="green">113</FONT>            @Override<a name="line.113"></a>
<FONT color="green">114</FONT>            protected void implConfigureBlocking(boolean block) throws IOException {<a name="line.114"></a>
<FONT color="green">115</FONT>                    socketUDT.configureBlocking(block);<a name="line.115"></a>
<FONT color="green">116</FONT>                    isBlockingMode = block;<a name="line.116"></a>
<FONT color="green">117</FONT>            }<a name="line.117"></a>
<FONT color="green">118</FONT>    <a name="line.118"></a>
<FONT color="green">119</FONT>            private volatile boolean isConnectionPending;<a name="line.119"></a>
<FONT color="green">120</FONT>    <a name="line.120"></a>
<FONT color="green">121</FONT>            @Override<a name="line.121"></a>
<FONT color="green">122</FONT>            public boolean connect(SocketAddress remote) throws IOException {<a name="line.122"></a>
<FONT color="green">123</FONT>    <a name="line.123"></a>
<FONT color="green">124</FONT>                    if (!isOpen()) {<a name="line.124"></a>
<FONT color="green">125</FONT>                            throw new ClosedChannelException();<a name="line.125"></a>
<FONT color="green">126</FONT>                    }<a name="line.126"></a>
<FONT color="green">127</FONT>    <a name="line.127"></a>
<FONT color="green">128</FONT>                    if (isConnected()) {<a name="line.128"></a>
<FONT color="green">129</FONT>                            log.warn("already connected; ignoring remote={}", remote);<a name="line.129"></a>
<FONT color="green">130</FONT>                            return true;<a name="line.130"></a>
<FONT color="green">131</FONT>                    }<a name="line.131"></a>
<FONT color="green">132</FONT>    <a name="line.132"></a>
<FONT color="green">133</FONT>                    if (remote == null) {<a name="line.133"></a>
<FONT color="green">134</FONT>                            close();<a name="line.134"></a>
<FONT color="green">135</FONT>                            throw new NullPointerException("remote == null");<a name="line.135"></a>
<FONT color="green">136</FONT>                    }<a name="line.136"></a>
<FONT color="green">137</FONT>    <a name="line.137"></a>
<FONT color="green">138</FONT>                    InetSocketAddress remoteSocket = (InetSocketAddress) remote;<a name="line.138"></a>
<FONT color="green">139</FONT>                    if (remoteSocket.isUnresolved()) {<a name="line.139"></a>
<FONT color="green">140</FONT>                            log.error("can not use unresolved address: remote={}", remote);<a name="line.140"></a>
<FONT color="green">141</FONT>                            close();<a name="line.141"></a>
<FONT color="green">142</FONT>                            throw new UnresolvedAddressException();<a name="line.142"></a>
<FONT color="green">143</FONT>                    }<a name="line.143"></a>
<FONT color="green">144</FONT>    <a name="line.144"></a>
<FONT color="green">145</FONT>                    if (isBlocking()) {<a name="line.145"></a>
<FONT color="green">146</FONT>                            if (isConnectionPending) {<a name="line.146"></a>
<FONT color="green">147</FONT>                                    close();<a name="line.147"></a>
<FONT color="green">148</FONT>                                    throw new ConnectionPendingException();<a name="line.148"></a>
<FONT color="green">149</FONT>                            } else {<a name="line.149"></a>
<FONT color="green">150</FONT>                                    isConnectionPending = true;<a name="line.150"></a>
<FONT color="green">151</FONT>                            }<a name="line.151"></a>
<FONT color="green">152</FONT>                            try {<a name="line.152"></a>
<FONT color="green">153</FONT>                                    begin();<a name="line.153"></a>
<FONT color="green">154</FONT>                                    socketUDT.connect(remoteSocket);<a name="line.154"></a>
<FONT color="green">155</FONT>                            } finally {<a name="line.155"></a>
<FONT color="green">156</FONT>                                    end(true);<a name="line.156"></a>
<FONT color="green">157</FONT>                            }<a name="line.157"></a>
<FONT color="green">158</FONT>                            isConnectionPending = false;<a name="line.158"></a>
<FONT color="green">159</FONT>                            return socketUDT.isConnected();<a name="line.159"></a>
<FONT color="green">160</FONT>                    } else { // non Blocking<a name="line.160"></a>
<FONT color="green">161</FONT>                            final SelectionKeyUDT key = channelKey;<a name="line.161"></a>
<FONT color="green">162</FONT>                            if (key == null) {<a name="line.162"></a>
<FONT color="green">163</FONT>                                    // this channel is independent of any selector<a name="line.163"></a>
<FONT color="green">164</FONT>                                    log.error("UDT channel is in non blocking mode;"<a name="line.164"></a>
<FONT color="green">165</FONT>                                                    + "must register with a selector "<a name="line.165"></a>
<FONT color="green">166</FONT>                                                    + "before trying to connect()");<a name="line.166"></a>
<FONT color="green">167</FONT>                                    throw new IllegalBlockingModeException();<a name="line.167"></a>
<FONT color="green">168</FONT>                            } else {<a name="line.168"></a>
<FONT color="green">169</FONT>                                    // this channel is registered with a selector<a name="line.169"></a>
<FONT color="green">170</FONT>                                    key.selectorUDT.submitConnectRequest(key, remoteSocket);<a name="line.170"></a>
<FONT color="green">171</FONT>                                    /*<a name="line.171"></a>
<FONT color="green">172</FONT>                                     * connection operation must later be completed by invoking the<a name="line.172"></a>
<FONT color="green">173</FONT>                                     * finishConnect() method.<a name="line.173"></a>
<FONT color="green">174</FONT>                                     */<a name="line.174"></a>
<FONT color="green">175</FONT>                                    return false;<a name="line.175"></a>
<FONT color="green">176</FONT>                            }<a name="line.176"></a>
<FONT color="green">177</FONT>                    }<a name="line.177"></a>
<FONT color="green">178</FONT>    <a name="line.178"></a>
<FONT color="green">179</FONT>            }<a name="line.179"></a>
<FONT color="green">180</FONT>    <a name="line.180"></a>
<FONT color="green">181</FONT>            /**<a name="line.181"></a>
<FONT color="green">182</FONT>             * note this is redundant for blocking mode<a name="line.182"></a>
<FONT color="green">183</FONT>             */<a name="line.183"></a>
<FONT color="green">184</FONT>            @Override<a name="line.184"></a>
<FONT color="green">185</FONT>            public boolean finishConnect() throws IOException {<a name="line.185"></a>
<FONT color="green">186</FONT>                    if (!isOpen()) {<a name="line.186"></a>
<FONT color="green">187</FONT>                            throw new ClosedChannelException();<a name="line.187"></a>
<FONT color="green">188</FONT>                    }<a name="line.188"></a>
<FONT color="green">189</FONT>                    if (isBlocking()) {<a name="line.189"></a>
<FONT color="green">190</FONT>                            return isConnected();<a name="line.190"></a>
<FONT color="green">191</FONT>                    } else { // non blocking<a name="line.191"></a>
<FONT color="green">192</FONT>                            if (isConnected()) {<a name="line.192"></a>
<FONT color="green">193</FONT>                                    logStatus();<a name="line.193"></a>
<FONT color="green">194</FONT>                                    return true;<a name="line.194"></a>
<FONT color="green">195</FONT>                            } else {<a name="line.195"></a>
<FONT color="green">196</FONT>                                    IOException exception = connectException;<a name="line.196"></a>
<FONT color="green">197</FONT>                                    if (exception == null) {<a name="line.197"></a>
<FONT color="green">198</FONT>                                            return false;<a name="line.198"></a>
<FONT color="green">199</FONT>                                    } else {<a name="line.199"></a>
<FONT color="green">200</FONT>                                            throw exception;<a name="line.200"></a>
<FONT color="green">201</FONT>                                    }<a name="line.201"></a>
<FONT color="green">202</FONT>                            }<a name="line.202"></a>
<FONT color="green">203</FONT>                    }<a name="line.203"></a>
<FONT color="green">204</FONT>            }<a name="line.204"></a>
<FONT color="green">205</FONT>    <a name="line.205"></a>
<FONT color="green">206</FONT>            @Override<a name="line.206"></a>
<FONT color="green">207</FONT>            public boolean isConnected() {<a name="line.207"></a>
<FONT color="green">208</FONT>                    return socketUDT.isConnected();<a name="line.208"></a>
<FONT color="green">209</FONT>            }<a name="line.209"></a>
<FONT color="green">210</FONT>    <a name="line.210"></a>
<FONT color="green">211</FONT>            @Override<a name="line.211"></a>
<FONT color="green">212</FONT>            public boolean isConnectionPending() {<a name="line.212"></a>
<FONT color="green">213</FONT>                    throw new RuntimeException("feature not available");<a name="line.213"></a>
<FONT color="green">214</FONT>            }<a name="line.214"></a>
<FONT color="green">215</FONT>    <a name="line.215"></a>
<FONT color="green">216</FONT>            /**<a name="line.216"></a>
<FONT color="green">217</FONT>             * See {@link java.nio.channels.SocketChannel#read(ByteBuffer)} contract;<a name="line.217"></a>
<FONT color="green">218</FONT>             * note: this method does not return (-1) as EOS (end of stream flag)<a name="line.218"></a>
<FONT color="green">219</FONT>             * <a name="line.219"></a>
<FONT color="green">220</FONT>             * @return &lt;code&gt;&lt;0&lt;/code&gt; should not happen&lt;br&gt;<a name="line.220"></a>
<FONT color="green">221</FONT>             *         &lt;code&gt;=0&lt;/code&gt; blocking mode: timeout occurred on receive&lt;br&gt;<a name="line.221"></a>
<FONT color="green">222</FONT>             *         &lt;code&gt;=0&lt;/code&gt; non-blocking mode: nothing is received by the<a name="line.222"></a>
<FONT color="green">223</FONT>             *         underlying UDT socket&lt;br&gt;<a name="line.223"></a>
<FONT color="green">224</FONT>             *         &lt;code&gt;&gt;0&lt;/code&gt; actual bytes received count&lt;br&gt;<a name="line.224"></a>
<FONT color="green">225</FONT>             * @see com.barchart.udt.SocketUDT#receive(ByteBuffer)<a name="line.225"></a>
<FONT color="green">226</FONT>             * @see com.barchart.udt.SocketUDT#receive(byte[], int, int)<a name="line.226"></a>
<FONT color="green">227</FONT>             */<a name="line.227"></a>
<FONT color="green">228</FONT>            @Override<a name="line.228"></a>
<FONT color="green">229</FONT>            public final int read(ByteBuffer buffer) throws IOException {<a name="line.229"></a>
<FONT color="green">230</FONT>    <a name="line.230"></a>
<FONT color="green">231</FONT>                    if (buffer == null) {<a name="line.231"></a>
<FONT color="green">232</FONT>                            throw new NullPointerException("buffer == null");<a name="line.232"></a>
<FONT color="green">233</FONT>                    }<a name="line.233"></a>
<FONT color="green">234</FONT>    <a name="line.234"></a>
<FONT color="green">235</FONT>                    final int remaining = buffer.remaining();<a name="line.235"></a>
<FONT color="green">236</FONT>    <a name="line.236"></a>
<FONT color="green">237</FONT>                    if (remaining &gt; 0) {<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>                            final SocketUDT socket = socketUDT;<a name="line.239"></a>
<FONT color="green">240</FONT>                            final boolean isBlocking = isBlockingMode;<a name="line.240"></a>
<FONT color="green">241</FONT>    <a name="line.241"></a>
<FONT color="green">242</FONT>                            final int sizeReceived;<a name="line.242"></a>
<FONT color="green">243</FONT>                            try {<a name="line.243"></a>
<FONT color="green">244</FONT>                                    if (isBlocking) {<a name="line.244"></a>
<FONT color="green">245</FONT>                                            begin(); // JDK contract for NIO blocking calls<a name="line.245"></a>
<FONT color="green">246</FONT>                                    }<a name="line.246"></a>
<FONT color="green">247</FONT>                                    if (buffer.isDirect()) {<a name="line.247"></a>
<FONT color="green">248</FONT>                                            sizeReceived = socket.receive(buffer);<a name="line.248"></a>
<FONT color="green">249</FONT>                                    } else {<a name="line.249"></a>
<FONT color="green">250</FONT>                                            assert buffer.hasArray();<a name="line.250"></a>
<FONT color="green">251</FONT>                                            byte[] array = buffer.array();<a name="line.251"></a>
<FONT color="green">252</FONT>                                            int position = buffer.position();<a name="line.252"></a>
<FONT color="green">253</FONT>                                            int limit = buffer.limit();<a name="line.253"></a>
<FONT color="green">254</FONT>                                            sizeReceived = socket.receive(array, position, limit);<a name="line.254"></a>
<FONT color="green">255</FONT>                                            if (0 &lt; sizeReceived &amp;&amp; sizeReceived &lt;= remaining) {<a name="line.255"></a>
<FONT color="green">256</FONT>                                                    buffer.position(position + sizeReceived);<a name="line.256"></a>
<FONT color="green">257</FONT>                                            }<a name="line.257"></a>
<FONT color="green">258</FONT>                                    }<a name="line.258"></a>
<FONT color="green">259</FONT>                            } finally {<a name="line.259"></a>
<FONT color="green">260</FONT>                                    if (isBlocking) {<a name="line.260"></a>
<FONT color="green">261</FONT>                                            end(true); // JDK contract for NIO blocking calls<a name="line.261"></a>
<FONT color="green">262</FONT>                                    }<a name="line.262"></a>
<FONT color="green">263</FONT>                            }<a name="line.263"></a>
<FONT color="green">264</FONT>    <a name="line.264"></a>
<FONT color="green">265</FONT>                            // see contract for receive()<a name="line.265"></a>
<FONT color="green">266</FONT>    <a name="line.266"></a>
<FONT color="green">267</FONT>                            if (sizeReceived &lt; 0) {<a name="line.267"></a>
<FONT color="green">268</FONT>                                    log.trace("nothing was received; socketID={}",<a name="line.268"></a>
<FONT color="green">269</FONT>                                                    socket.getSocketId());<a name="line.269"></a>
<FONT color="green">270</FONT>                                    return 0;<a name="line.270"></a>
<FONT color="green">271</FONT>                            }<a name="line.271"></a>
<FONT color="green">272</FONT>    <a name="line.272"></a>
<FONT color="green">273</FONT>                            if (sizeReceived == 0) {<a name="line.273"></a>
<FONT color="green">274</FONT>                                    log.trace("receive timeout; socketID={}", socket.getSocketId());<a name="line.274"></a>
<FONT color="green">275</FONT>                                    return 0;<a name="line.275"></a>
<FONT color="green">276</FONT>                            }<a name="line.276"></a>
<FONT color="green">277</FONT>    <a name="line.277"></a>
<FONT color="green">278</FONT>                            if (sizeReceived &lt;= remaining) {<a name="line.278"></a>
<FONT color="green">279</FONT>                                    return sizeReceived;<a name="line.279"></a>
<FONT color="green">280</FONT>                            } else { // should not happen<a name="line.280"></a>
<FONT color="green">281</FONT>                                    log.error("unexpected: sizeReceived &gt; remaining; socketID={}",<a name="line.281"></a>
<FONT color="green">282</FONT>                                                    socket.getSocketId());<a name="line.282"></a>
<FONT color="green">283</FONT>                                    return 0;<a name="line.283"></a>
<FONT color="green">284</FONT>                            }<a name="line.284"></a>
<FONT color="green">285</FONT>    <a name="line.285"></a>
<FONT color="green">286</FONT>                    } else {<a name="line.286"></a>
<FONT color="green">287</FONT>                            return 0;<a name="line.287"></a>
<FONT color="green">288</FONT>                    }<a name="line.288"></a>
<FONT color="green">289</FONT>            }<a name="line.289"></a>
<FONT color="green">290</FONT>    <a name="line.290"></a>
<FONT color="green">291</FONT>            @Override<a name="line.291"></a>
<FONT color="green">292</FONT>            public long read(ByteBuffer[] dsts, int offset, int length)<a name="line.292"></a>
<FONT color="green">293</FONT>                            throws IOException {<a name="line.293"></a>
<FONT color="green">294</FONT>                    throw new RuntimeException("feature not available");<a name="line.294"></a>
<FONT color="green">295</FONT>            }<a name="line.295"></a>
<FONT color="green">296</FONT>    <a name="line.296"></a>
<FONT color="green">297</FONT>            // guarded by 'this'<a name="line.297"></a>
<FONT color="green">298</FONT>            protected Socket socketAdapter;<a name="line.298"></a>
<FONT color="green">299</FONT>    <a name="line.299"></a>
<FONT color="green">300</FONT>            @Override<a name="line.300"></a>
<FONT color="green">301</FONT>            public Socket socket() {<a name="line.301"></a>
<FONT color="green">302</FONT>                    synchronized (this) {<a name="line.302"></a>
<FONT color="green">303</FONT>                            if (socketAdapter == null) {<a name="line.303"></a>
<FONT color="green">304</FONT>                                    socketAdapter = new AdapterSocketUDT(this, socketUDT);<a name="line.304"></a>
<FONT color="green">305</FONT>                            }<a name="line.305"></a>
<FONT color="green">306</FONT>                            return socketAdapter;<a name="line.306"></a>
<FONT color="green">307</FONT>                    }<a name="line.307"></a>
<FONT color="green">308</FONT>            }<a name="line.308"></a>
<FONT color="green">309</FONT>    <a name="line.309"></a>
<FONT color="green">310</FONT>            //<a name="line.310"></a>
<FONT color="green">311</FONT>    <a name="line.311"></a>
<FONT color="green">312</FONT>            // used for debugging<a name="line.312"></a>
<FONT color="green">313</FONT>            // private final AtomicInteger writeCount = new AtomicInteger(0);<a name="line.313"></a>
<FONT color="green">314</FONT>            // private final AtomicInteger writeSize = new AtomicInteger(0);<a name="line.314"></a>
<FONT color="green">315</FONT>    <a name="line.315"></a>
<FONT color="green">316</FONT>            /**<a name="line.316"></a>
<FONT color="green">317</FONT>             * See {@link java.nio.channels.SocketChannel#write(ByteBuffer)} contract;<a name="line.317"></a>
<FONT color="green">318</FONT>             * <a name="line.318"></a>
<FONT color="green">319</FONT>             * @return &lt;code&gt;&lt;0&lt;/code&gt; should not happen&lt;br&gt;<a name="line.319"></a>
<FONT color="green">320</FONT>             *         &lt;code&gt;=0&lt;/code&gt; blocking mode: timeout occurred on send&lt;br&gt;<a name="line.320"></a>
<FONT color="green">321</FONT>             *         &lt;code&gt;=0&lt;/code&gt; non-blocking mode: buffer is full in the<a name="line.321"></a>
<FONT color="green">322</FONT>             *         underlying UDT socket; nothing is sent&lt;br&gt;<a name="line.322"></a>
<FONT color="green">323</FONT>             *         &lt;code&gt;&gt;0&lt;/code&gt; actual bytes sent count&lt;br&gt;<a name="line.323"></a>
<FONT color="green">324</FONT>             * @see com.barchart.udt.SocketUDT#send(ByteBuffer)<a name="line.324"></a>
<FONT color="green">325</FONT>             * @see com.barchart.udt.SocketUDT#send(byte[], int, int)<a name="line.325"></a>
<FONT color="green">326</FONT>             */<a name="line.326"></a>
<FONT color="green">327</FONT>            @Override<a name="line.327"></a>
<FONT color="green">328</FONT>            public final int write(ByteBuffer buffer) throws IOException {<a name="line.328"></a>
<FONT color="green">329</FONT>    <a name="line.329"></a>
<FONT color="green">330</FONT>                    // writeCount.incrementAndGet();<a name="line.330"></a>
<FONT color="green">331</FONT>    <a name="line.331"></a>
<FONT color="green">332</FONT>                    if (buffer == null) {<a name="line.332"></a>
<FONT color="green">333</FONT>                            throw new NullPointerException("buffer == null");<a name="line.333"></a>
<FONT color="green">334</FONT>                    }<a name="line.334"></a>
<FONT color="green">335</FONT>    <a name="line.335"></a>
<FONT color="green">336</FONT>                    final int remaining = buffer.remaining();<a name="line.336"></a>
<FONT color="green">337</FONT>    <a name="line.337"></a>
<FONT color="green">338</FONT>                    if (remaining &gt; 0) {<a name="line.338"></a>
<FONT color="green">339</FONT>    <a name="line.339"></a>
<FONT color="green">340</FONT>                            final SocketUDT socket = socketUDT;<a name="line.340"></a>
<FONT color="green">341</FONT>                            final boolean isBlocking = isBlockingMode;<a name="line.341"></a>
<FONT color="green">342</FONT>    <a name="line.342"></a>
<FONT color="green">343</FONT>                            final int sizeSent;<a name="line.343"></a>
<FONT color="green">344</FONT>                            try {<a name="line.344"></a>
<FONT color="green">345</FONT>                                    if (isBlocking) {<a name="line.345"></a>
<FONT color="green">346</FONT>                                            begin(); // JDK contract for NIO blocking calls<a name="line.346"></a>
<FONT color="green">347</FONT>                                    }<a name="line.347"></a>
<FONT color="green">348</FONT>                                    if (buffer.isDirect()) {<a name="line.348"></a>
<FONT color="green">349</FONT>                                            sizeSent = socket.send(buffer);<a name="line.349"></a>
<FONT color="green">350</FONT>                                    } else {<a name="line.350"></a>
<FONT color="green">351</FONT>                                            assert buffer.hasArray();<a name="line.351"></a>
<FONT color="green">352</FONT>                                            byte[] array = buffer.array();<a name="line.352"></a>
<FONT color="green">353</FONT>                                            int position = buffer.position();<a name="line.353"></a>
<FONT color="green">354</FONT>                                            int limit = buffer.limit();<a name="line.354"></a>
<FONT color="green">355</FONT>                                            sizeSent = socket.send(array, position, limit);<a name="line.355"></a>
<FONT color="green">356</FONT>                                            if (0 &lt; sizeSent &amp;&amp; sizeSent &lt;= remaining) {<a name="line.356"></a>
<FONT color="green">357</FONT>                                                    buffer.position(position + sizeSent);<a name="line.357"></a>
<FONT color="green">358</FONT>                                            }<a name="line.358"></a>
<FONT color="green">359</FONT>                                    }<a name="line.359"></a>
<FONT color="green">360</FONT>                            } finally {<a name="line.360"></a>
<FONT color="green">361</FONT>                                    if (isBlocking) {<a name="line.361"></a>
<FONT color="green">362</FONT>                                            end(true); // JDK contract for NIO blocking calls<a name="line.362"></a>
<FONT color="green">363</FONT>                                    }<a name="line.363"></a>
<FONT color="green">364</FONT>                            }<a name="line.364"></a>
<FONT color="green">365</FONT>    <a name="line.365"></a>
<FONT color="green">366</FONT>                            // see contract for send()<a name="line.366"></a>
<FONT color="green">367</FONT>    <a name="line.367"></a>
<FONT color="green">368</FONT>                            if (sizeSent &lt; 0) {<a name="line.368"></a>
<FONT color="green">369</FONT>                                    log.trace("no buffer space for send; socketID={}",<a name="line.369"></a>
<FONT color="green">370</FONT>                                                    socket.getSocketId());<a name="line.370"></a>
<FONT color="green">371</FONT>                                    // logStatus();<a name="line.371"></a>
<FONT color="green">372</FONT>                                    // log.info("writeCount={} writeSize={}", writeCount,<a name="line.372"></a>
<FONT color="green">373</FONT>                                    // writeSize);<a name="line.373"></a>
<FONT color="green">374</FONT>                                    // System.exit(1);<a name="line.374"></a>
<FONT color="green">375</FONT>                                    return 0;<a name="line.375"></a>
<FONT color="green">376</FONT>                            }<a name="line.376"></a>
<FONT color="green">377</FONT>    <a name="line.377"></a>
<FONT color="green">378</FONT>                            if (sizeSent == 0) {<a name="line.378"></a>
<FONT color="green">379</FONT>                                    log.trace("send timeout; socketID={}", socket.getSocketId());<a name="line.379"></a>
<FONT color="green">380</FONT>                                    return 0;<a name="line.380"></a>
<FONT color="green">381</FONT>                            }<a name="line.381"></a>
<FONT color="green">382</FONT>    <a name="line.382"></a>
<FONT color="green">383</FONT>                            if (sizeSent &lt;= remaining) {<a name="line.383"></a>
<FONT color="green">384</FONT>                                    // writeSize.addAndGet(sizeSent);<a name="line.384"></a>
<FONT color="green">385</FONT>                                    return sizeSent;<a name="line.385"></a>
<FONT color="green">386</FONT>                            } else { // should not happen<a name="line.386"></a>
<FONT color="green">387</FONT>                                    log.error("unexpected: sizeSent &gt; remaining; socketID={}",<a name="line.387"></a>
<FONT color="green">388</FONT>                                                    socket.getSocketId());<a name="line.388"></a>
<FONT color="green">389</FONT>                                    return 0;<a name="line.389"></a>
<FONT color="green">390</FONT>                            }<a name="line.390"></a>
<FONT color="green">391</FONT>    <a name="line.391"></a>
<FONT color="green">392</FONT>                    } else {<a name="line.392"></a>
<FONT color="green">393</FONT>                            return 0;<a name="line.393"></a>
<FONT color="green">394</FONT>                    }<a name="line.394"></a>
<FONT color="green">395</FONT>            }<a name="line.395"></a>
<FONT color="green">396</FONT>    <a name="line.396"></a>
<FONT color="green">397</FONT>            @Override<a name="line.397"></a>
<FONT color="green">398</FONT>            public long write(ByteBuffer[] srcs, int offset, int length)<a name="line.398"></a>
<FONT color="green">399</FONT>                            throws IOException {<a name="line.399"></a>
<FONT color="green">400</FONT>                    throw new RuntimeException("feature not available");<a name="line.400"></a>
<FONT color="green">401</FONT>            }<a name="line.401"></a>
<FONT color="green">402</FONT>    <a name="line.402"></a>
<FONT color="green">403</FONT>            @Override<a name="line.403"></a>
<FONT color="green">404</FONT>            public SocketUDT getSocketUDT() {<a name="line.404"></a>
<FONT color="green">405</FONT>                    return socketUDT;<a name="line.405"></a>
<FONT color="green">406</FONT>            }<a name="line.406"></a>
<FONT color="green">407</FONT>    <a name="line.407"></a>
<FONT color="green">408</FONT>            @Override<a name="line.408"></a>
<FONT color="green">409</FONT>            public KindUDT getChannelKind() {<a name="line.409"></a>
<FONT color="green">410</FONT>                    return KindUDT.CONNECTOR;<a name="line.410"></a>
<FONT color="green">411</FONT>            }<a name="line.411"></a>
<FONT color="green">412</FONT>    <a name="line.412"></a>
<FONT color="green">413</FONT>            // note: 1&lt;-&gt;1 mapping of channels and keys<a name="line.413"></a>
<FONT color="green">414</FONT>    <a name="line.414"></a>
<FONT color="green">415</FONT>            protected volatile SelectionKeyUDT channelKey;<a name="line.415"></a>
<FONT color="green">416</FONT>    <a name="line.416"></a>
<FONT color="green">417</FONT>            protected void setRegistredKey(SelectionKeyUDT key) {<a name="line.417"></a>
<FONT color="green">418</FONT>                    // one time init<a name="line.418"></a>
<FONT color="green">419</FONT>                    assert channelKey == null;<a name="line.419"></a>
<FONT color="green">420</FONT>                    channelKey = key;<a name="line.420"></a>
<FONT color="green">421</FONT>            }<a name="line.421"></a>
<FONT color="green">422</FONT>    <a name="line.422"></a>
<FONT color="green">423</FONT>            // set by connector task<a name="line.423"></a>
<FONT color="green">424</FONT>    <a name="line.424"></a>
<FONT color="green">425</FONT>            protected volatile IOException connectException;<a name="line.425"></a>
<FONT color="green">426</FONT>    <a name="line.426"></a>
<FONT color="green">427</FONT>            protected void setConnectException(IOException exception) {<a name="line.427"></a>
<FONT color="green">428</FONT>                    this.connectException = exception;<a name="line.428"></a>
<FONT color="green">429</FONT>            }<a name="line.429"></a>
<FONT color="green">430</FONT>    <a name="line.430"></a>
<FONT color="green">431</FONT>            @Override<a name="line.431"></a>
<FONT color="green">432</FONT>            public boolean isOpenSocketUDT() {<a name="line.432"></a>
<FONT color="green">433</FONT>                    return socketUDT.isOpen();<a name="line.433"></a>
<FONT color="green">434</FONT>            }<a name="line.434"></a>
<FONT color="green">435</FONT>    <a name="line.435"></a>
<FONT color="green">436</FONT>            //<a name="line.436"></a>
<FONT color="green">437</FONT>    <a name="line.437"></a>
<FONT color="green">438</FONT>            @Override<a name="line.438"></a>
<FONT color="green">439</FONT>            public String toString() {<a name="line.439"></a>
<FONT color="green">440</FONT>                    return socketUDT.toString();<a name="line.440"></a>
<FONT color="green">441</FONT>            }<a name="line.441"></a>
<FONT color="green">442</FONT>    <a name="line.442"></a>
<FONT color="green">443</FONT>            void logStatus() {<a name="line.443"></a>
<FONT color="green">444</FONT>                    if (channelKey != null) {<a name="line.444"></a>
<FONT color="green">445</FONT>                            log.debug("channelKey={}", channelKey);<a name="line.445"></a>
<FONT color="green">446</FONT>                    }<a name="line.446"></a>
<FONT color="green">447</FONT>                    log.debug("options={}", socketUDT.toStringOptions());<a name="line.447"></a>
<FONT color="green">448</FONT>                    log.debug("monitor={}", socketUDT.toStringMonitor());<a name="line.448"></a>
<FONT color="green">449</FONT>            }<a name="line.449"></a>
<FONT color="green">450</FONT>    <a name="line.450"></a>
<FONT color="green">451</FONT>    }<a name="line.451"></a>




























































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